PIC16F1709-I/SS - 8-bit 32MHz MCU 14KB Flash 20-SSOP | Microchip
MPN: PIC16F1709-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.74 | $1.74 |
| 10 | $1.57 | $15.70 |
| 100 | $1.39 | $139.00 |
| 500 | $1.24 | $620.00 |
| 1,000 | $1.1 | $1,100.00 |
PIC16F1709-I/SS Overview
An 8-bit microcontroller (MCU) is a single-chip computer based on a byte-wide data path. The PIC16F1709 belongs to the PIC16 family from Microchip, sits within the enhanced mid-range XLP (eXtreme Low Power) line, and forms part of the broader PIC microcontroller hierarchy (PIC10/12/14/16/18/24/32). It is classified as a Flash-based CMOS RISC microcontroller IC designed for general-purpose embedded control.
Key features include XLP technology for sub-microamp sleep currents, on-chip op amps, Core Independent Peripherals (CLC, COG/NCO, Zero Cross Detect), Peripheral Pin Select (PPS) for flexible signal routing, and an integrated 32MHz internal oscillator that eliminates the need for an external crystal in many applications. The device operates from 1.8V to 5.5V.
The PIC16F1709 uses a Harvard RISC architecture with a 14-bit instruction word. Hardware multipliers are not present, but the enhanced instruction set supports C-friendly development with the XC8 compiler. PPS allows digital peripheral pins to be remapped, simplifying PCB layout and reducing GPIO conflicts.
Typical applications include LED lighting control, sensor signal conditioning using the on-chip op amps, battery-powered IoT sensor nodes leveraging XLP sleep modes, consumer appliance control, and low-cost motor control (PWM via COG/NCO). The on-chip 10-bit ADC with computation enables touch-style and averaging applications without CPU overhead.
When designing with this part, evaluate current consumption at the chosen sleep mode: XLP sleep draws ~50 nA typical. Provide a stable VDDCORE decoupling network of 0.1uF and 1uF in parallel, and reserve the MCLR pin configuration if in-circuit serial programming is required.
This page synthesizes distributor pricing, drop-in PIC16F1709 family alternatives in the same SSOP-20 footprint, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC16F1709-I/SS — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC16F1709-I/SS (same form factor and footprint) — differing in ADC, Package, Comparators, Core Independent Peripherals, Data EEPROM.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F1708-I/SS
✅ Drop-In✓ In Stock
$1.18 / Unit
View Datasheet →PIC16F1708-E/SS
✅ Drop-In✓ In Stock
$0.69 / Unit
View Datasheet →PIC16F1618-E/SS
✅ Drop-In✓ In Stock
$0.85 / Unit
View Datasheet →PIC16F1518-I/SS
✅ Drop-In✓ In Stock
$1.2 / Unit
View Datasheet →PIC16F15344-I/SS
✅ Drop-In✓ In Stock
$0.79 / Unit
View Datasheet →PIC16F1459-I/SS
✅ Drop-In✓ In Stock
$1.55 / Unit
View Datasheet →PIC16F1709-I/SS Maximum Ratings & Electrical Characteristics
| Series | PIC® XLP™ 16F |
| Core Processor | PIC |
| Core Size | 8-bit |
| Architecture | Enhanced mid-range (x14) |
| Program Memory (Flash) | 14 KB (8K x 14) |
| RAM | 1024 bytes |
| EEPROM | 256 bytes |
| Maximum Clock Frequency | 32 MHz |
| Instruction Cycle Time | 200 ns at 20 MHz |
| Supply Voltage (VDD) | 1.8 V to 5.5 V |
| Number of I/O Pins | Up to 18 (depending on package) |
| ADC | 10-bit, up to 17 channels |
| DAC | 8-bit, 1 channel |
| Comparators | Yes |
| On-chip Op Amps | Yes |
| Core Independent Peripherals | CLC, COG/NCO, Zero Cross Detect |
| Peripheral Pin Select (PPS) | Yes |
| Operating Temperature | -40C to +85C (industrial) |
| Package | 20-pin SSOP (0.209 inch / 5.30 mm width) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| XLP Sleep Current | Approximately 50 nA typical |
PIC16F1709-I/SS Pin Configuration
| Pin 1 | RA5 — GPIO / AN4 / C1IN+/T1G/HCOUT |
| Pin 2 | RA4 — GPIO / AN3 / C1IN-/T1G/OSC2 |
| Pin 3 | RA3 — GPIO / AN2 / C1IN+ / MCLR (configuration-dependent) |
| Pin 4 | RC5 — GPIO / AN10 / C2IN+ |
| Pin 5 | RC4 — GPIO / AN9 / C2IN- |
| Pin 6 | RC3 — GPIO / AN8 / C12IN3- |
| Pin 7 | RC6 — GPIO / AN11 / SS |
| Pin 8 | RC7 — GPIO / AN12 / SDI |
| Pin 9 | RB7 — GPIO / ICSPCLK / TX |
| Pin 10 | RB6 — GPIO / ICSPDAT / RX |
| Pin 11 | RB5 — GPIO / AN13 |
| Pin 12 | RB4 — GPIO / AN10 |
| Pin 13 | RB3 — GPIO / C12IN2- |
| Pin 14 | RB2 — GPIO / DACOUT1 |
| Pin 15 | RB1 — GPIO / AN10 / OPA1IN- |
| Pin 16 | RB0 — GPIO / AN12 / OPA1OUT |
| Pin 17 | VDD — Positive power supply |
| Pin 18 | VSS — Ground reference |
| Pin 19 | RA2 — GPIO / AN2 / DACREF |
| Pin 20 | RA1 — GPIO / AN1 / OPA1IN+ |
Typical Applications
PIC16F1709-I/SS is suitable for 7 applications: LED Lighting Control and Dimming, Battery-Powered IoT Sensor Nodes, Consumer Appliance Control (Coffee Machines, Washers, HVAC), Touch and Capacitive Sensing Interfaces, Industrial Sensor Signal Conditioning, Low-Cost Stepper and DC Motor Control, Smart Home and Building Automation.
LED Lighting Control and Dimming
The PIC16F1709's integrated Configurable Logic Cell (CLC) and Complementary Output Generator (COG/NCO) enable hardware-driven PWM dimming without CPU intervention, making it ideal for constant-current LED drivers. With on-chip 8-bit DAC supporting 0-5V analog dimming and Zero Cross Detect for phase-cut triac control, the device handles both modern DC and legacy AC dimmer topologies. The 32MHz core and 14KB Flash accommodate multi-channel lighting protocols such as DALI or DMX firmware, while XLP sleep modes cut standby power below 50nA for energy-starved battery fixtures.
Recommended
Battery-Powered IoT Sensor Nodes
The PIC16F1709's XLP technology delivers approximately 50nA sleep current, enabling multi-year battery life in wireless sensor endpoints transmitting periodically. On-chip op amps condition analog sensor signals (thermistors, photodiodes, electrochemical cells) without external analog ICs, while the 17-channel 10-bit ADC with computation performs averaging and threshold detection autonomously. PPS remapping reduces PCB trace congestion, and the 1.8-5.5V VDD range supports direct Li-ion or 2xAA battery operation. Combined with the 32MHz internal oscillator, BOM cost is minimized by eliminating external timing hardware.
Recommended
Consumer Appliance Control (Coffee Machines, Washers, HVAC)
The PIC16F1709-I/SS suits white-goods control boards where 18 GPIO drive HMI keypads, relays, triacs, and tri-color LED indicators. Core Independent Peripherals (CLC, COG/NCO) offload motor timing from the CPU, freeing firmware to manage user interfaces and safety diagnostics. The 14KB Flash holds protocol stacks for BLE-via-UART bridge or NFC pairing firmware, while EEPROM stores user settings and calibration data. Industrial -40C to +85C temperature grade tolerates appliance thermal environments.
Recommended
Touch and Capacitive Sensing Interfaces
The PIC16F1709's mTouch capacitive sensing module combined with the 10-bit ADC with computation provides robust touch button and slider implementations without external touch ICs. The 32MHz core runs Microchip's capacitive touch libraries, while DMA-free operation leverages Core Independent Peripherals for sub-millisecond scan latency. 14KB Flash stores touch firmware plus baseline calibration, and 256B EEPROM retains thresholds across power cycles. PPS flexibility routes touch channels to any GPIO, simplifying PCB layout under mechanical constraints.
Recommended
Industrial Sensor Signal Conditioning
The PIC16F1709's on-chip operational amplifiers implement instrumentation, transimpedance, and active filter topologies for 4-20mA loops, photodiode amplifiers, and bridge sensors. With up to 17 ADC channels, the device simultaneously digitizes temperature, pressure, and flow signals while CLC handles zero-crossing detection for AC line monitoring. The 1024B RAM buffers raw ADC samples for digital filtering, and PPS remapping simplifies isolation barrier routing. Industrial -40C to +85C operation supports factory floor deployments.
Recommended
Low-Cost Stepper and DC Motor Control
The PIC16F1709's COG/NCO peripheral generates complementary PWM with programmable dead-band delay, directly driving H-bridge motor drivers without CPU overhead. With up to 32MHz clock, current-loop PI calculations execute in microseconds, and the 8-bit DAC provides reference voltage for closed-loop current sensing. 14KB Flash holds trapezoidal or sinusoidal commutation tables, while the 1.8-5.5V range supports direct 3.3V or 5V driver ICs. PPS flexibility routes encoder inputs to any GPIO.
Recommended
Smart Home and Building Automation
The PIC16F1709-I/SS serves as a low-power node controller in Zigbee/Z-Wave/BLE bridge designs, handling UART-based wireless module interfacing and on-board sensor aggregation. XLP sleep modes draw ~50nA between transmissions, and 14KB Flash fits local control logic plus OTA bootloaders. The on-chip DAC drives analog dimmers or thermistor references, while CLC implements window comparators for occupancy detection. Industrial temperature grade ensures reliability in unheated equipment closets.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F1709-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1708-I/SS | PIC16F1708-E/SS | PIC16F1618-E/SS | PIC16F1518-I/SS | PIC16F15344-I/SS | PIC16F1459-I/SS |
|---|---|---|---|---|---|---|---|
| Package | 20-SSOP | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 14 KB | 7 KB | 7 KB | 7 KB | 28 KB | 7 KB | 14 KB |
| RAM | 1024 B | 512 B | 512 B | 512 B | 1024 B | 512 B | 1024 B |
| Maximum Clock Frequency | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 20 MHz | 32 MHz | 20 MHz |
| Operating Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| On-chip Op Amps | Yes | Yes | Yes | Yes | No | No | No |
| USB Support | No | No | No | No | No | No | Yes (USB 2.0 FS) |
| Temperature Grade | -40C to +85C (Industrial) | -40C to +85C | -40C to +125C (Extended) | -40C to +125C | -40C to +85C | -40C to +85C | -40C to +85C |
Key Differentiators
- On-chip operational amplifiers eliminate external analog ICs (vs PIC16F15344-I/SS)
- Lowest-cost intelligent analog 8-bit MCU in SSOP-20 (vs PIC16F1618-E/SS)
- Broader Core Independent Peripheral set than older PIC16F1 family (vs PIC16F1705-I/SS)
Design Notes
The PIC16F1709's XLP sleep current is approximately 50nA typical with RTC from LFINTOSC; to achieve this, configure all unused peripherals to OFF, set all GPIO to inputs with WPU disabled, and ensure the MCLR pin is configured as digital input rather than reset. Use a 1uF + 0.1uF parallel decoupling network on VDD within 5mm of the package pin to suppress switching noise.
MCLR must be tied to VDD through a 10k pull-up for normal operation, or configured as a digital input (RA3) only after disabling the MCLR function via CONFIG register. Forgetting this is a common cause of 'dead' PIC16F1709 boards. The PICKit programmer requires MCLR to be accessible - do not permanently tie to VDD if in-circuit serial programming is required.
Place the 32.768kHz crystal (if used) within 5mm of the SOSCO/SOSCI pins with a grounded guard ring to minimize noise pickup. PPS remapping allows digital peripherals to be assigned to any GPIO - leave one or two spare GPIOs near PCB corners as remapping headroom. Route analog signals (ANx, OPAx) away from digital switching traces to preserve ADC accuracy.
The 10-bit ADC's effective ENOB drops when source impedance exceeds 10k ohm due to internal sample-and-hold settling. Add a 1nF to 100nF buffer cap on ADC inputs when reading high-impedance sensors, or use the on-chip op amp as a unity-gain buffer before the ADC channel. Reference voltage decoupling (VREF+/VREF-) requires 100nF ceramics.
The PIC16F1709-I/SS SSOP-20 package has theta_JA approximately 100C/W on a standard 4-layer JEDEC test board. At maximum active current of approximately 5mA at 32MHz and 5V, the device dissipates only 25mW - thermal management is not a concern under normal operation. However, ensure the package is not encapsulated in thermally insulating potting compound in closed fixtures.
Compliance Information
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - for automotive applications consider PIC16F1709-E/SS variants or PIC16F family automotive grades. Lead-free and halogen-free per Microchip environmental certification.
